package com.lagou.handler;

import com.lagou.common.RpcRequest;
import com.lagou.service.UserServiceImpl;
import com.lagou.util.SpringUtil;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.concurrent.EventExecutorGroup;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;

/**
 * 自定义的业务处理器
 */
@Component
public class UserServiceHandler extends ChannelInboundHandlerAdapter{
    @Autowired
    private SpringUtil springUtil;

    //当客户端读取数据时,该方法会被调用
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {

        //注意:  客户端将来发送请求的时候会传递一个参数:  UserService#sayHello#are you ok
         //1.判断当前的请求是否符合规则
        /*if(msg.toString().startsWith("UserService")){
            //2.如果符合规则,调用实现类货到一个result
            UserServiceImpl service = new UserServiceImpl();
            String result = service.sayHello(msg.toString().substring(msg.toString().lastIndexOf("#")+1));
            //3.把调用实现类的方法获得的结果写到客户端
            ctx.writeAndFlush(result);
        }*/
        RpcRequest request = (RpcRequest) msg;

        Class<?> aClass = Class.forName(request.getClassName());
        Object bean = springUtil.getBean(aClass);
        Method method = aClass.getMethod(request.getMethodName(), request.getParameterTypes());
        Object result =  method.invoke(bean, request.getParameters());
        ctx.writeAndFlush(result);

    }

}
